Joa Member
| Belongs to | Leetse Formation |
| Type | lithostratigraphy |
| Rank | Member |
| Scope | regional |
| Status | formal standard |
| Author | Männil |
| Year | 1958 |
| Etymon | Joa, waterfall (E) |
| Original locality | Jägala-joa waterfall |
| Age (Ma) | Hunneberg Stage |
| Alt. index | OIIltJ |
| Date added | 2006-06-14 |
| Date changed | 2014-11-27 |
Locality | Type | From (m) | To (m) | Reference | Remarks | |
|---|---|---|---|---|---|---|
| Jägala waterfall | holostratotype | Hints, L. et al., 1993a |
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